Notice the grooves? The pretty little lines that make you want to follow them and sniff all the way to the end, wherever that may be?
They are there, according to mommy, for traction. See, I have nails and paws that spread out like snowshoes in snow and ice, and they keep me pretty stable, but cars need extra help on these dirt roads. In winter they get very, very icy, which is good for me, 'cause it keeps mommy walking fast so she can't stop or turn around and make me go back inside, but bad for the cars since they don't have nails to dig in, just big tires.
The town brings out these big machines that I like to bark at, that mommy calls graders, and they scrape the road and put grooves in them to provide traction for the cars.
Pretty nifty, eh?
and Arwen the Wonder Dog